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Finding the Fourth Proportional to 913.56, 1,369.68 and 451.52

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Solution

The fourth proportional to 913.56, 1,369.68 and 451.52 is: 676.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.56 : 1,369.68 = 451.52 : x
  2. Step 2: Convert to fraction form
    913.56/1,369.68 = 451.52/x
  3. Step 3: Cross multiply
    913.56x = 1,369.68 × 451.52
  4. Step 4: Simplify right side
    913.56x = 618,437.91
  5. Step 5: Solve for x
    x = 618,437.91/913.56
  6. Step 6: Final answer
    x = 676.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.